The A-1806D is a keypad station with arm, disarm and exit delay. Enter the 1 to 6 digit access code. The yellow LED will flash 3 times. Press the key to disarm the zone, the # key to arm the zone or the 0 key to initiate time delay. Red LED for system armed, green LED for system unarmed, yellow LED for exit delay mode. Two gang satin stainless steel plate. It fits standard 2-gang electrical box. The satin finish stainless steel faceplate with silk-screened designations may be flush mounted on standard outlet box with dual-gang plaster ring.